Dropcloth is a free productivity-minded program that is able to blank out your desktop with a single color, allowing you to focus on just one window. Here’s a description from the Dropcloth download page:
“Dropcloth is a simple application that overlays a solid colored window on top of your desktop. Especially handy for clearing your desktop [...]

Fugu is an SFTP, SCP and SSH client for Mac OS X that features an Aqua interface with all the security features of these secure protocols.
SFTP and SCP are protocols that enable you to connect to a remote server and exchange files with that machine securely. We say “securely”, because SFTP (secure file transfer protocol) [...]

Ad-Aware offers a layer of protection against malicious software floating around the computer world, threatening to infect your system and compromise your privacy. Ad-Aware offers real time protection against current and future threats.
Ad-Aware is anti-spyware/anti-malware software designed to recognize and defeat these threats before they’re able to find their way into your computer and cause [...]